Your baby’s lungs mature throughout the third trimester and by 32 weeks your baby is much more likely to survive if born prematurely. Your baby makes breathing movements, even though the lungs don’t work properly until birth. Fat stores are laid down in preparation for birth. Your baby grows fine hair and fingernails, the eyes open and close, and teeth may start growing under the gums.
Weight gain in pregnancy
Weight gain is a normal part of pregnancy – the exact amount varies from woman to woman. Your midwife will weigh you at your first appointment. Unless you are very overweight or very underweight, your midwife probably won’t weigh you again because it doesn’t necessarily give any useful information about your developing baby.
If you’re concerned about your weight gain, talk to your midwife or GP. They’ll be able to tell you whether it’s too much or too little for you and your baby.
The weight you gain during pregnancy isn’t the same as getting fat. The extra weight should be made up of:
- The developing baby, placenta and amniotic fluid
- The growth of your womb and breasts
- The increased blood in your circulation
- Water retention
- Essential fat stores.